非膝曲珊瑚藻的隐伏多样性:西大西洋蔷薇藻新属和7个新种

IF 2 4区生物学 Q2 MARINE & FRESHWATER BIOLOGY

European Journal of Phycology Pub Date : 2021-10-04 DOI:10.1080/09670262.2021.1950839

Luana Miranda Coutinho, Fernanda Penelas Gomes, M. Nasri Sissini, Talita Vieira-Pinto, Maria Carolina Muller de Oliveira Henriques, M. C. Oliveira, Paulo Antunes Horta, Maria Beatriz Barbosa de Barros Barreto

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引用次数: 8

摘要

分子研究揭示了石芋属植物的隐生多样性和多生性。在这项研究中，我们的目的是研究的多样性和系统发育的标本，形态上描述为Lithothamnion沿巴西海岸广泛收集和综合分类方法。我们的结果导致Roseolithon gen. 11 .属于Melobesioideae亚科。根据psbA、rbcL-3P、COI-5P和SSU - rDNA分子标记的系统发育分析、种界划分方法、遗传分化和形态解剖观察，对热带西北大西洋和暖温带西南大西洋标本进行了描述。综合方法使我们发现了一组Roseolithon的形态学特征:(i)菌体组织庞大，有羽状下菌体(非同轴);(ii)喇叭状上皮细胞;(iii)上皮下细胞大小不一，可能比其周围的细胞更短、大约相等或更长;(iv)相邻细丝的细胞通过融合体连接;多公司的四/双向概念室;(六)孔道的存在，孔道的边界是凹陷中的玫瑰花状细胞，使表面呈凹坑状。根据不同的物种，这种凹陷的外观是由于凹陷或解体的蔷薇细胞顶。莲座细胞顶的退化程度是本属植物的特征。新属Roseolithon由至少18个种组成，其中描述了7个新种:Roseolithon tupii、R. tamoioi、R. trembei、R. potiguarae、R. karaiborum、R. purii和R. goytacae。系统发育分析显示石芋属是一个多系属。综合分类使新属Roseolithon的描述成为可能。形态解剖不能反映非膝曲珊瑚藻的分子系统发育。

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Cryptic diversity in non-geniculate coralline algae: a new genus Roseolithon (Hapalidiales, Rhodophyta) and seven new species from the Western Atlantic

ABSTRACT Molecular studies have revealed cryptic diversity and polyphyly in the genus Lithothamnion. In this study we aimed to investigate the diversity and phylogeny of specimens that are morphologically described as Lithothamnion based on extensive collections along the Brazilian coast and an integrative taxonomic approach. Our results led to the proposal of Roseolithon gen. nov. belonging to the subfamily Melobesioideae. This new genus is described from the tropical north-western Atlantic and warm temperate south-western Atlantic specimens, based on phylogenetic analyses of psbA, rbcL-3P, COI-5P and SSU rDNA molecular markers, species delimitation methods, genetic divergence and morpho-anatomical observations. The integrative approach led us to find a set of morphological features that characterize Roseolithon: (i) thallus organization monomerous with plumose hypothallus (non-coaxial); (ii) flared epithallial cells; (iii) subepithallial cells varying in size and may be shorter, approximately equal to or longer than those subtending them; (iv) cells of adjacent filaments linked by fusions; (v) tetra/bisporangial conceptacle chambers multiporate; and (vi) the presence of pore canals bordered by rosette cells in depressions giving the surface a pitted appearance. Depending on the species, this pitted appearance occurs due to the sunken or disintegrated rosette cell roofs. The grade of the degeneration of the rosette cell roofs characterizes the species of this genus. The new genus Roseolithon is composed of at least 18 species, of which we describe seven new species: Roseolithon tupii, R. tamoioi, R. tremembei, R. potiguarae, R. karaiborum, R. purii and R. goytacae. Highlights Phylogenetic analyses revealed Lithothamnion to be a polyFphyletic genus. Integrative taxonomy enabled the description of a new genus Roseolithon. Morpho-anatomy does not reflect molecular phylogeny of non-geniculate coralline algae.

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来源期刊

European Journal of Phycology 生物-海洋与淡水生物学

CiteScore

4.80

自引率

4.20%

发文量

审稿时长

>12 weeks

期刊介绍： The European Journal of Phycology is an important focus for the activities of algal researchers all over the world. The Editors-in-Chief are assisted by an international team of Associate Editors who are experts in the following fields: macroalgal ecology, microalgal ecology, physiology and biochemistry, cell biology, molecular biology, macroalgal and microalgal systematics, applied phycology and biotechnology. The European Journal of Phycology publishes papers on all aspects of algae, including cyanobacteria. Articles may be in the form of primary research papers and reviews of topical subjects. The journal publishes high quality research and is well cited, with a consistently good Impact Factor.